Legend Names

Mix.install([
  {:plotly_ex, "~> 0.3"},
  {:kino, "~> 0.18"}
])

Section

Set name: on each trace to control the text shown in the legend. Without a name, Plotly uses the trace index ("trace 0", "trace 1", etc.).

alias Plotly.{Figure, Scatter}

Figure.new()
|> Figure.add_trace(Scatter.new(x: [1, 2, 3], y: [1, 4, 3], name: "Blue Trace", mode: "lines"))
|> Figure.add_trace(Scatter.new(x: [1, 2, 3], y: [4, 1, 2], name: "Red Trace", mode: "lines"))
|> Figure.update_layout(title: "Named Legend Entries")
|> Plotly.show()